Argo Questions | PrepOps.Dev

ArgoCD 101 13 questions

#1
What is Argo CD?
#2
There been a lot of CI/CD systems before ArgoCD (Jenkins, Teamcity, CircleCI, etc.) What added value ArgoCD brought?
#3
Describe an example of workflow where ArgoCD is used
#4
True or False? ArgoCD supports Kubernetes YAML files but not other manifests formats like Helm Charts and Kustomize
#5
What "GitOps Repository" means in regards to ArgoCD?
#6
What are the advantages in using GitOps approach/repository?
#7
Sorina, one of the engineers in your team, made manual changes to the cluster that override some of the configuration in a repo traced by ArgoCD. What will happen?
#8
Nate, one of the engineers in your organization, asked whether it's possible if ArgoCD didn't sync for changes done manually to the cluster. What would be your answer?
#9
How cluster disaster recovery becomes easier with ArgoCD?
#10
Ella, an engineer in your team, claims ArgoCD benefit is that it's an extension Kubernetes, it's part of the cluster. Sarah, also an engineer in your team, claims it's not a real benefit as Jenkins can be also deployed in the cluster hence being part of it. What's your take?
#11
How the main resource in ArgoCD called?
#12
Explain what is an "Application" in regards to ArgoCD
#13
How ArgoCD makes access management in the cluster easier?

Practical ArgoCD 101 11 questions

#14
Describe the purpose of the following section in a an Application YAML file
```
source:
  repoURL: https://github.com/bregman-arie/devops-exercises
  targetRevision: HEAD
  path: main
```
#15
Describe the purpose of the following section in a an Application YAML file
```
destination:
  server: http://some.kubernetes.cluster.svc
  namespace: devopsExercises
```
#16
What CRD would you use if you have multiple applications and you would like to group them together logically?
#17
True or False? ArgoCD sync period is 3 hours
#18
Describe shortly what ArgoCD does every sync period
#19
You deployed a new application in a namespace called "yay" but when running kubectl get ns yay you see there is no such namespace. What happened?
#20
Create a new application with the following properties:
- app name: some-app
- repo: https://fake.repo.address
- app path: ./app_path
- namespace: default
- cluster: my.kubernetes.cluster
#21
List all argocd apps
#22
Print detailed information on the app called "some-app"
#23
How to add an additional (external) cluster for ArgoCD to manage?
#24
How to list all the clusters ArgoCD manage?

ArgoCD Configuration 2 questions

#25
Is it possible to change default sync period of ArgoCD?
#26
What will be the result of setting timeout.reconciliation: 0s?

Advanced ArgoCD 4 questions

#27
What is the "App of Apps Patterns"?
#28
Can you provide some use cases for using "App of Apps Patterns"?
#29
True or False? If you have multiple Kubernetes clusters you want to manage sync applications to with ArgoCD then, you must have ArgoCD installed on each one of them
#30
You've three clusters - dev, staging and prod. Whenever you update the application GitOps repo, all three clusters are being updated. What's the problem with that and how to deal with it?

ArgoCD Application Health 4 questions

#31
What are some possible health statuses for an ArgoCD application?
#32
True or False? A Deployment considered to be healthy if the Pods are running
#33
True or False? An ingress is considered healthy if status.loadBalancer.ingress list includes at least one value
#34
What can you tell about the health of custom Kubernetes resources?

ArgoCD Syncs 3 questions

#35
Explain manual syncs vs. automatic syncs
#36
Explain auto-pruning
#37
Explain self-heal in regards to ArgoCD

ArgoCD and Helm 2 questions

#38
What support is provided in ArgoCD for Helm?
#39
True or False? When ArgoCD tracks Helm chart the chart is no longer an Helm application and it's a ArgoCD app

Argo Rollouts 101 3 questions

#40
What is Argo Rollouts?
#41
What happens when you rollout a new version of your app with argo rollouts?
#42
True or False? You need to install ArgoCD in order to use Argo Rollouts

Argo Advanced Rollouts 3 questions

#43
Scott, an engineer in your team, executes manually some smoke tests and monitors rollouts every time a new version is deployed. This way, if there is an issue he detects, he performs a rollback. What better approach you might suggest him to take?
#44
Explain the concept of "Analysis" in regards to Argo Rollouts

#45

Explain the following configuration

apiVersion: argoproj.io/v1alpha1
kind: AnalysisTemplate
metadata:
  name: success-rate
spec:
  args:
  - name: service-name
  metrics:
  - name: success-rate
    interval: 4m
    count: 3
    successCondition: result[0] >= 0.90
    provider:
      prometheus:
        address: http:/some-prometheus-instance:80
        query: sum(response_status{app="{{args.service-name}}",role="canary",status=~"2.*"})/sum(response_status{app="{{args.service-name}}",role="canary"}

Argo Rollouts Commands 6 questions

#46
How to list rollouts?
#47
How to list the rollouts of a given application?
#48
How to check the status of a rollout?
#49
How to rollout a new version (with new container tag)?
#50
How to manually promote to new app version?
#51
How do you monitor a rollout?